body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
}
.clear{
  clear: both;
}
ul,li,ol{
  list-style: none;
  margin: 0;
  padding: 0;
}
a{
  text-decoration: none;
}
.fr{
  float: right;
}
.fl{
  float: left;
}
.clear:after{
  display: block;
  overflow: hidden;
  width: 0;
  clear: both;
  content: '';
}